How can i increasing the value of a math.random over time?
So i got this line of code:
TEST:setLinearVelocity(0, math.random(100, 150))
And like to increase the (100, 150) by steps of 10 so :
(100, 150) - (110, 160) - (120, 170) - (130, 180) - … and so on.
What is the best way of doing this?
Kevin-
function NewRange (first, last, step) local count = last - first return function() local result = math.random(first, first + count) first = first + step return result end end local Velocity = NewRange(100, 150, 10)
Not tested, but that should give you something like it, that you can reuse. Then just call as Velocity() each time.
That is not working but can i do something like this ?
testa = 100 testb = 150 badclouts:setLinearVelocity(0, math.random(.. testa, .. testb)) -- Drop down local function speatTimer() testa = testa+1 testb = testb+1 --print("testa " .. testa) --print("testb " .. testb) end local mainTimer = timer.performWithDelay( 1000, speatTimer, 500 )
PS: I do get a ‘unexpected symbol’ error on this code.
Kevin-
but can i do something like this ?
Well, that’s up to you. 
The unexpected symbol is just your two “…” symbols in the math.random() calls (copy-paste error).
As for my example, I should have said something like “Then call as badclouts:setLinearVelocity(0, Velocity()) each time”.
Hi StarCrunch,
Removing the “…” works 
thanks. anyway is you way better than my way of doing it or dos it not matter?
Kevin-
Hi. It probably doesn’t matter. Obviously you have a better idea what you’re doing.
If you had several objects independently updating, then you might want to do something like I did.
one more thing when i use this :
tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3, 0)
it selects 1 between 9/50 (and stays that value) but i want it to refresh this value every time, any idea how to fix this ?
kevin-
For that, don’t pass the 0 as the last parameter:
tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3)
Call it the same way at the end of spawnBC3 (let it overwrite the handle, since the old timer’s done).
why i do :
local badclout3 = {} local bad3Group = display.newGroup() local function spawnBC3() local badclouts3 = display.newImage("BCloud3.png") badclouts3.x = math.random(0, \_W) badclouts3.name = "badclout3" physics.addBody(badclouts3, {bounce=0, filter=b}) badclouts3.bodyType = "kinematic" badclouts3.isSensor = true badclouts3.y = math.random(-100, -50) badclouts3.index = #badclout3 + 1 bad3Group:insert(badclouts3) badclouts3.rotation = math.random(-30,30) -- Rotate the object badclouts3:setLinearVelocity(0, math.random(speeda, speedb)) -- Drop down badclout3[badclouts3.index] = badclouts3 print("test a " .. spawna) print("test b " .. spawnb) print("test speed a " .. speeda) print("test speed b " .. speedb) return badclouts3 tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3) local mainTimertest = timer.performWithDelay( 100, tmrSpawn, 500 )
it runes one time
Add the “tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3)” line before “return badclouts3” in spawnBC3 (so it’s called once outside, and the rest of the times after each timeout).
(Also, the mainTimerTest line seems a little suspect… it might be interpreted it as a table listener, but I wouldn’t think it would do anything.)
StarCrunch you are my hero Thank you!!
Kevin-
function NewRange (first, last, step) local count = last - first return function() local result = math.random(first, first + count) first = first + step return result end end local Velocity = NewRange(100, 150, 10)
Not tested, but that should give you something like it, that you can reuse. Then just call as Velocity() each time.
That is not working but can i do something like this ?
testa = 100 testb = 150 badclouts:setLinearVelocity(0, math.random(.. testa, .. testb)) -- Drop down local function speatTimer() testa = testa+1 testb = testb+1 --print("testa " .. testa) --print("testb " .. testb) end local mainTimer = timer.performWithDelay( 1000, speatTimer, 500 )
PS: I do get a ‘unexpected symbol’ error on this code.
Kevin-
but can i do something like this ?
Well, that’s up to you. The unexpected symbol is just your two “…” symbols in the math.random() calls (copy-paste error).
As for my example, I should have said something like “Then call as badclouts:setLinearVelocity(0, Velocity()) each time”.
Hi StarCrunch,
Removing the “…” works thanks. anyway is you way better than my way of doing it or dos it not matter?
Kevin-
Hi. It probably doesn’t matter. Obviously you have a better idea what you’re doing.
If you had several objects independently updating, then you might want to do something like I did.
one more thing when i use this :
tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3, 0)
it selects 1 between 9/50 (and stays that value) but i want it to refresh this value every time, any idea how to fix this ?
kevin-
For that, don’t pass the 0 as the last parameter:
tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3)
Call it the same way at the end of spawnBC3 (let it overwrite the handle, since the old timer’s done).
why i do :
local badclout3 = {} local bad3Group = display.newGroup() local function spawnBC3() local badclouts3 = display.newImage("BCloud3.png") badclouts3.x = math.random(0, \_W) badclouts3.name = "badclout3" physics.addBody(badclouts3, {bounce=0, filter=b}) badclouts3.bodyType = "kinematic" badclouts3.isSensor = true badclouts3.y = math.random(-100, -50) badclouts3.index = #badclout3 + 1 bad3Group:insert(badclouts3) badclouts3.rotation = math.random(-30,30) -- Rotate the object badclouts3:setLinearVelocity(0, math.random(speeda, speedb)) -- Drop down badclout3[badclouts3.index] = badclouts3 print("test a " .. spawna) print("test b " .. spawnb) print("test speed a " .. speeda) print("test speed b " .. speedb) return badclouts3 tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3) local mainTimertest = timer.performWithDelay( 100, tmrSpawn, 500 )
it runes one time
Add the “tmrSpawn = timer.performWithDelay(math.random(9, 50), spawnBC3)” line before “return badclouts3” in spawnBC3 (so it’s called once outside, and the rest of the times after each timeout).
(Also, the mainTimerTest line seems a little suspect… it might be interpreted it as a table listener, but I wouldn’t think it would do anything.)